Sand core forming device

The utility model discloses a sand core forming device which comprises a machine frame, the machine frame is provided with a sand shooting device used for shooting sand, the machine frame is fixedly connected with a working box, the working box is fixedly connected with a first air cylinder, the output end of the first air cylinder is fixedly connected with a lower platen, the lower platen is fixedly connected with a supporting frame, and a lower die is arranged on the upper end face of the supporting frame. The rack is fixedly connected with an upper table plate, an upper die is arranged on the lower end face of the upper table plate, the upper die and the lower die are provided with matched cavities, and the upper table plate is provided with sand shooting holes communicated with the cavities; the supporting frame is rotationally connected with a supporting plate, the supporting plate is fixedly provided with a first motor, an output shaft of the first motor is fixedly connected with a lead screw, the two e